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path: root/drivers/mfd/wm831x-otp.c
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Diffstat (limited to 'drivers/mfd/wm831x-otp.c')
-rw-r--r--drivers/mfd/wm831x-otp.c10
1 files changed, 2 insertions, 8 deletions
diff --git a/drivers/mfd/wm831x-otp.c b/drivers/mfd/wm831x-otp.c
index b90f3e06b..ebac0027f 100644
--- a/drivers/mfd/wm831x-otp.c
+++ b/drivers/mfd/wm831x-otp.c
@@ -47,20 +47,14 @@ static ssize_t wm831x_unique_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct wm831x *wm831x = dev_get_drvdata(dev);
- int i, rval;
+ int rval;
char id[WM831X_UNIQUE_ID_LEN];
- ssize_t ret = 0;
rval = wm831x_unique_id_read(wm831x, id);
if (rval < 0)
return 0;
- for (i = 0; i < WM831X_UNIQUE_ID_LEN; i++)
- ret += sprintf(&buf[ret], "%02x", buf[i]);
-
- ret += sprintf(&buf[ret], "\n");
-
- return ret;
+ return sprintf(buf, "%*phN\n", WM831X_UNIQUE_ID_LEN, id);
}
static DEVICE_ATTR(unique_id, 0444, wm831x_unique_id_show, NULL);